Method _updateVisibility

src/core/core.controller.js:892–906

* @private

(datasetIndex, dataIndex, visible)

	 * @private
	 */
  _updateVisibility(datasetIndex, dataIndex, visible) {
    const mode = visible ? 'show' : 'hide';
    const meta = this.getDatasetMeta(datasetIndex);
    const anims = meta.controller._resolveAnimations(undefined, mode);

    if (defined(dataIndex)) {
      meta.data[dataIndex].hidden = !visible;
      this.update();
    } else {
      this.setDatasetVisibility(datasetIndex, visible);
      // Animate visible state, so hide animation can be seen. This could be handled better if update / updateDataset returned a Promise.
      anims.update(meta, {visible});
      this.update((ctx) => ctx.datasetIndex === datasetIndex ? mode : undefined);
    }
  }

  hide(datasetIndex, dataIndex) {
    this._updateVisibility(datasetIndex, dataIndex, false);